Chuck.



PATENTED AUG. 18, 1908.

F. RAI-IM.

CHUCK.

APPLIOATIO FILED SEPT. 23, 1905.

JO Z LG 7 @Q A l' UNITED. sTAfrEs A)PATENT oEEroE.

FRED RAI-IM, OF LOUISVILLE, KENTUCKY.

' CHUCK. A

Application filed September 23, 1905.

.-To all whom it may concern:

Be it known that I, FRED RAHM, a .citizen of the United States, residing' at Louisville, in the county of Jefferson and State'of Kentucky, have' invented a new and useful Chuck," of which the following isa specification.

This invention relates to chucks for engine lathes, and the objects of my improve# ment are, precision, comparative inexpensiveness of manufacture, facility of use, ease and quickness of manipulation, and durability.- These objects I attain by means of the mechanism illustrated in the accompanying drawings, in Which- Figure 1 is a vertical sectional view; Fig. 2 is a front end view; and Fig. 3, a longitudinal elevation of a modification of the tapered attachment-piece.

1 represents the body. of the chuck; 2 is a common split-chuck bushing 3 is the attachment-piece for attaching to the lathe s indle; 4 is the lathe s indle; 5 is a nut for tlghtening the split bus ing 2; 6 is an integral bevel gear on nut 5; 7 is a bevel pinion meshing with ear 6; '8 is a socket for a wrench, integral with and for the purpose of turning pinion 7 9 is a bushing screwed into body 1 to hold-pinion 7 in place and form a bearing therefor; 10 is a hardened stationary bushingsecured in the outer end of body 1; 11 represents the inner bearing-pintle of pinion' 7,' 13 is a collar screwed into body 1 adapted to hold gear 6 and nut 5 in place; and, 14 is a modification of the attachmentlece.

The attachment-pieces 3 and 14 are externally tapered at 1`2, and the body 1 of the chuck is internally tapered correspondingly to t pieces 3 and 14 so that the body 1 may be removed from pieces 3 and 14 and applied thereto soV a's to fit accurately and run true. Body 1 is axially bored to receive the splitchuck bushing 2 accurately. end of body 1 is let in a piece, 10, preferably of hardened tool steel, bored with a tapered hole and ground true so as to lit .the taperedl ortion of bushing 2. The back of body 1 is cred out to accommodate the attachmentpieces and the nut 5. When body 1 is removed from attachment-piece 3 or 14, nut 5 may be inserted or removed. Nut 5 is ada ted to screw on the threaded portion of busfiing 2 and is connected with an annular Specification of Letters Patent.

In the outer 'c1s1on. l

Patented Aug. 18, 1908.

:ferial No. 279,776.

integral bevel-gear, 6. Behind said b evelgear ortion is a shoulder, and body 1 1s interna ly threaded to receive an annular locknut, 13, provided with holes for receiving'a wrench, and adapted to screw into body 1 behind gear 6 and thus prevent gear 6 and nut 5 from displacement or dropping out of the body.

y In the side of body 1 is provided ano ening which is of such size and form at its ottom as to accommodate and form a bearing for pintle 11, which is integal with bevel pin' ion 7, the outer portion of said opening being threaded to receive a bushing, 9, provided with means for applying'a wrench and setting it down tight upon the bottom of the counter-bore so that its lower end bears on a shoulder on bevelinion 7, and also to providev an external caring for said pinion. Pinion 7 is provided at its outer end. with a square or hexagonsocket, 8, adapted to receive a Wrench for. opening and closing the chuck.

The attachment-piece 3 may be internally threaded, as shown in Fig. 1, ada ting it to screw on the working end of the athe-spindle, or the modification 14 may be used, formed with a taper shank (Fig. 3) adapted to fit the taper hole in the lathe spindle.

The operation of this chuck wlll now be obvious. A split bushing 2 is selected,

slightly larger than the stock to be clamped may then'be easily app ied to any of these l machines; and stock or tools held with pre- Having thus described my-invention so that any one skilled in the art pertaining thereto may make and use it, I claim- A lathe chuck com rising a body portion prrovlded with an aXia chamber placed at its ont end, a socket in its rear end, a chambered attachment-piece adapted to fit the socket of said body portion and to be secured to the spindle of a lathe or drill-press, a

splitchuok bushing ittin the axial chamber concentrioally disposed, and a pinion ineshd of said body portion and aving an external ing with said gear Wheel, substantially as thread on its rear ortion, a nut mounted in specified.

the rear part of sai body portion so dis osed v FRED RAHM. 5 and arranged as to engage the threade por- Witnessesf tion at the rear end of the shank of said splt- J. H. MARTIN COOKE,

chuck bushngand having gear teeth thereon i J. S. BORDEN'. 

